Window frame



FIG. 1 is a perspective view of the window frame;

FIG. 2 is a alternate perspective view of the window frame in FIG. 1;

FIG. 3 is a left end view of the window frame;

FIG. 4 is a right end view of the window frame;

FIG. 5 is a top view of the window frame in FIG. 3;

FIG. 6 is a bottom view of the window frame in FIG. 3;

FIG. 7 is a left side view of the window frame in FIG. 3;

FIG. 8 is a right side view of the window frame in FIG. 3; and,

FIG. 9 is an alternate perspective view of the window frame in FIG. 1. 

I claim the ornamental design for a window frame, as shown and described. 